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- Title
Efimov Physics in Small Bosonic Clusters.
- Authors
Gattobigio, M.; Kievsky, A.; Viviani, M.
- Abstract
We study small clusters of bosons, A = 2, 3, 4, 5, 6, characterized by a resonant interaction. Firstly, we use a soft-gaussian interaction that reproduces the values of the dimer binding energy and the atom-atom scattering length obtained with LM2M2 potential, a widely used He-He interaction. We change the intensity of the potential to explore the clusters' spectra in different regions with large positive and large negative values of the two-body scattering length and we report the clusters' energies on Efimov plot, which makes the scale invariance explicit. Secondly, we repeat our calculation adding a repulsive three-body force to reproduce the trimer binding energy. In all the region explored, we have found that these systems present two states, one deep and one shallow close to the A − 1 threshold, and scale invariance has been investigated for these states. The calculations are performed by means of Hyperspherical Harmonics basis set.
- Subjects
BOSONS; NUCLEAR cluster model; BINDING energy; ATOM-atom collisions; TWO-body problem (Physics); HYPERSPHERICAL method; NUCLEAR spectroscopy
- Publication
Few-Body Systems, 2013, Vol 54, Issue 7-10, p1547
- ISSN
0177-7963
- Publication type
Article
- DOI
10.1007/s00601-013-0630-4